<template>
  <div>
    <div class="biggestBox">
      <ul>
        <!-- data-type=0 隐藏删除按钮 data-type=1 显示删除按钮 -->
        <li class="li_vessel" v-for="(item,index) in lists " data-type="0" :key="index">
          <!-- "touchstart" 当手指触摸屏幕时候触发  "touchend"  当手指从屏幕上离开的时候触发  "capture" 用于事件捕获-->
          <div @touchstart.capture="touchStart" @touchend.capture="touchEnd" @click="oneself">
            <div class="contant">
              <img class="image" :src="item.imgUrl" alt />
              <div class="rightBox">
                <div>{{item.title}}</div>
                <div>{{item.subheading}}</div>
                <div>{{item.faddish}}</div>
                <div>{{item.price}}</div>
              </div>
            </div>
          </div>
          <div class="removeBtn" @click="remove" :data-index="index">删除</div>
        </li>
      </ul>
    </div>
  </div>
</template>


<!--zhaomingshuo-->

<!--左滑动有删除按钮-->
<script>
export default {
  name: "index",
  data() {
    return {
      lists: [{
        title: "标题1",
        imgUrl: "https://z3.ax1x.com/2021/05/18/gfwKHg.jpg",
        subheading: "副标题1",
        faddish: "爆款",
        price: "￥12.00",
      },
        {
          title: "标题2",
          imgUrl: "https://z3.ax1x.com/2021/05/18/gfwKHg.jpg",
          subheading: "副标题2",
          faddish: "爆款",
          price: "￥58.00",
        },
        {
          title: "标题3",
          imgUrl: "https://z3.ax1x.com/2021/05/18/gfwKHg.jpg",
          subheading: "副标题3",
          faddish: "爆款",
          price: "￥99.99",
        },
        {
          title: "标题4",
          imgUrl: "https://z3.ax1x.com/2021/05/18/gfwKHg.jpg",
          subheading: "副标题4",
          faddish: "爆款",
          price: "￥88.32",
        },
        {
          title: "标题5",
          imgUrl: "https://z3.ax1x.com/2021/05/18/gfwKHg.jpg",
          subheading: "副标题5",
          faddish: "爆款",
          price: "￥9999.99",
        },
      ],
      startX: 0, //滑动开始
      endX: 0, //滑动结束
    };
  },
  methods: {
    // 向左滑动出现删除按钮时，点击商品信息区域取消删除
    oneself() {
      console.log("向左滑动出现删除按钮时，点击商品信息区域取消删除")
      if (this.checkSlide()) {
        this.restSlide();
      } else {
        // 点击商品信息弹出弹框
        console.log("点击当前商品触发事件...");
      }
    },
    //滑动开始
    touchStart(e) {
      console.log("滑动开始")
      // 记录初始位置
      this.startX = e.touches[0].clientX;
    },
    //滑动结束
    touchEnd(e) {
      console.log("滑动结束")
      // 当前滑动的父级元素
      let parentElement = e.currentTarget.parentElement;
      // 记录结束位置
      this.endX = e.changedTouches[0].clientX;
      console.log("1")
      // 左滑大于30距离删除出现
      if (parentElement.dataset.type == 0 && this.startX - this.endX > 30) {
        console.log("2")
        this.restSlide();
        parentElement.dataset.type = 1;
      }
      // 右滑
      if (parentElement.dataset.type == 1 && this.startX - this.endX < -30) {
        console.log("3")
        this.restSlide();
        parentElement.dataset.type = 0;
      }
      console.log("4")
      this.startX = 0;
      this.endX = 0;
    },
    //判断当前是否有滑块处于滑动状态
    checkSlide() {
      console.log("判断当前是否有滑块处于滑动状态")
      let listItems = document.querySelectorAll(".li_vessel");
      for (let i = 0; i < listItems.length; i++) {
        if (listItems[i].dataset.type == 1) {
          return true;
        }
      }
      return false;
    },
    //复位滑动状态
    restSlide() {
      console.log("复位滑动状态")
      let listItems = document.querySelectorAll(".li_vessel");
      // 复位
      for (let i = 0; i < listItems.length; i++) {
        listItems[i].dataset.type = 0;
      }
    },
    //删除数据信息
    remove(e) {
      // 当前索引值
      let index = e.currentTarget.dataset.index;
      // 复位
      this.restSlide();
      // 删除数组lists中一个数据
      this.lists.splice(index, 1);
    },
  },
};
</script>

<style scoped>
.biggestBox {
  overflow: hidden;
  /*超出部分隐藏*/
}

ul {
  /* 消除 ul 默认样式 */
  list-style: none;
  padding: 0;
  margin: 0;
}

.li_vessel {
  /* 全部样式 0.2秒 缓动*/
  transition: all 0.2s;
}

/* =0隐藏 */
.li_vessel[data-type="0"] {
  transform: translate3d(0, 0, 0);
}

/* =1显示 */
.li_vessel[data-type="1"] {
  /* -64px 设置的越大可以左滑的距离越远，最好与下面删除按钮的宽度以及定位的距离设置一样的值*/
  transform: translate3d(-64px, 0, 0);
}

/* 删除按钮 */
.li_vessel .removeBtn {
  width: 64px;
  height: 103px;
  background: #ff4949;
  font-size: 16px;
  color: #fff;
  text-align: center;
  line-height: 22px;
  position: absolute;
  top: 0px;
  right: -64px;
  line-height: 103px;
  text-align: center;
  border-radius: 2px;
}

/* 左边的图片样式 */
.contant {
  overflow: hidden;
  /*消除图片带来的浮动*/
  padding: 10px;
  background: #ffffff;
}

.contant .image {
  width: 80px;
  height: 80px;
  border-radius: 4px;
  float: left;
}

/* 右边的文字信息样式 */
.rightBox {
  overflow: hidden;
  padding-left: 8px;
}

.rightBox div:first-child {
  font-weight: bold;
}

.rightBox div:nth-child(2) {
  margin-top: 4px;
  font-size: 14px;
}

.rightBox div:nth-child(3) {
  width: 36px;
  background: rgb(219, 91, 113);
  color: white;
  font-size: 12px;
  text-align: center;
  padding: 2px 4px 2px 4px;
  margin-left: auto;
}

.rightBox div:last-child {
  color: red;
  font-size: 14px;
  font-weight: bold;
}
</style>
